吸烟者冠心病:维生素C恢复冠心微循环功能
P A Kaufmann1, T Gnecchi-Ruscone, M di Terlizzi
1MRC Clinical Sciences Centre, Imperial College School of Medicine, Hammersmith Hospital, London, UK.
Circulation
|September 12, 2000
概括
由于氧化应激,吸烟会损害大动脉和微循环中的冠状动脉血流. 抗氧化剂维生素C恢复了吸烟者的冠状动脉流量储备,突出了其潜在的治疗作用.
科学领域:
- 心血管医学 心血管医学
- 氧化压力研究研究 氧化压力研究
- 药理学 药理学是指药理学的学科.
背景情况:
- 没有冠状动脉疾病的吸烟者表现出冠状动脉内皮功能和血管运动受损.
- 增加的氧化压力是吸烟者血管损伤的可疑原因.
研究的目的:
- 研究吸烟对冠状动脉微循环和心肌动脉血流调节的影响.
- 为了确定维生素C是否可以恢复吸烟者的冠状动脉流量储备.
主要方法:
- 用正子发射断层扫描测量了11名吸烟者和8名对照对象的冠状动脉流量储量.
- 在服用抗氧化剂维生素C之前和之后进行了测量.
主要成果:
- 与对照组相比,在吸烟者中,冠状动脉流量储备的基线下降了21% (P<0.05).
- 维生素C在吸烟者中使冠状动脉流量储量正常化,但对对照人群没有影响.
- 这表明吸烟的抗氧化作用延伸到冠状动脉微循环.
结论:
- 吸烟引起的氧化应激会损害冠状动脉微循环和心肌血流调节.
- 在吸烟者中,维生素C的使用恢复了冠状动脉的微循环反应能力和冠状动脉流量储备的受损.
- 这些发现提供了证据,氧化压力对吸烟的血管损伤有显著的贡献.
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